EP0964157A1 - Tiefbrunnenpumpe mit integriertem Druckschalter - Google Patents

Tiefbrunnenpumpe mit integriertem Druckschalter Download PDF

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Publication number
EP0964157A1
EP0964157A1 EP99830358A EP99830358A EP0964157A1 EP 0964157 A1 EP0964157 A1 EP 0964157A1 EP 99830358 A EP99830358 A EP 99830358A EP 99830358 A EP99830358 A EP 99830358A EP 0964157 A1 EP0964157 A1 EP 0964157A1
Authority
EP
European Patent Office
Prior art keywords
pump
motor
tap
water
riser pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99830358A
Other languages
English (en)
French (fr)
Inventor
Gino Fioretti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Officine Di Trevi Di Fioretti Gino & C - Sas
Original Assignee
Officine Di Trevi Di Fioretti Gino & C - Sas
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Officine Di Trevi Di Fioretti Gino & C - Sas filed Critical Officine Di Trevi Di Fioretti Gino & C - Sas
Publication of EP0964157A1 publication Critical patent/EP0964157A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet

Definitions

  • the present patent application relates to a canned motor pump used to extract water from wells, capable of switching off automatically and immediately when the water tap is turned off and switching on automatically when the water tap is turned on.
  • the canned motor pump according to the present invention has been designed to overcome the serious drawback of the currently available canned motor pumps represented by their manual operation.
  • Traditional canned motor pumps used to extract water from wells feature a rather elongated cylindrical structure provided with a top cap used to hook the cable that holds the pump inside the well and insert the power electric cable and the water delivery pipe.
  • the controls used to switch on the pump and supply water are located on the surface and consist of a switch connected to the electric power supply cable and of a tap connected to the water delivery pipe, respectively.
  • a tank with a pressure switch is sometimes installed on the surface, along the delivery pipe just before the tap and outside the well.
  • the tank is also capable of accumulating a certain volume of water at the top of the tap.
  • the automatic stop devices are mounted after the installation of the pumps and they often require the intervention of skilled installers, as in the case of tanks.
  • the purpose of the present invention is to create a canned motor pump capable of switching on and off automatically and immediately when the tap is opened and closed, respectively. It is important to note that the pump according to the present invention is capable of switching on and off automatically without using additional separate devices.
  • the main peculiarity of the pump according to the present invention is represented by the fact that all the components that are necessary to automatically switch on and off the pump are contained in the pump structure and available for the user from the moment he purchases the pump.
  • the pump according to the present invention is not only capable to gLiarantee the integrity of the electric motor, but also to avoid all the difficulties and costs necessary today to install tanks or similar devices on the surface in order to automatically stop the operation of the pump motor, according to the description above.
  • the pump according to the present invention is capable of stopping automatically and immediately when the water pressure in the delivery water pipe exceeds the set value (as it happens when the tap is closed and the pump motor is still operating), and starting up again automatically when the water pressure drops below the second threshold (as it happens when the tap is re-opened).
  • the pump (1) usually features an elongated cylindrical structure which houses the electric motor (2) in its lower end.
  • a cap (1a) is located at the top of the pump, on which the connections for the riser pipe (3) and the electrical cable (4) are located, as well as an eyebolt (5) for the supporting rope.
  • a non-return valve (7) is installed in intermediate position between the connection point of the external vertical riser pipe (3) and the internal delivery water conduit (6). Thanks to the valve action, the water remains inside the riser pipe (3) between the body of the pump (1) and the water tap (3a) even when the pump motor is not working.
  • a pressure sensor (8) that communicates through a small pipe (8a) with the mouth of the external riser pipe (3) is mounted immediately below the non-return valve (7). In this way the pressure sensor (8) is capable of detecting the water pressure in the mouth of the external riser pipe (3).
  • the sensor (8) is responsible for the activation and deactivation of the motor of the pump (1), since it determines the deactivation of the electric motor when a set (high) water pressure value is detected inside the riser pipe (3). At the same time, it is responsible for the reactivation of the pump motor when a set (low) pressure threshold is detected inside the riser pipe (3).
  • the first condition - that is a high pressure value in the riser pipe (3) - is determined when the tap (3a) is closed by the user, but the motor of the pump (1) is still operating.
  • the second condition - that is a low pressure value in the riser pipe (3) - is determined when the tap (3a) is re-opened and the motor of the pump (1) is in stall.
  • the pressure sensor (7) features two logical states (on-off) that alternate when the water in the riser pipe (3) reaches the set minimum or maximum pressure value.
  • the two logical states are part of an electric circuit (shown in figure 3) capable of switching on the pump when the tap is opened (with the low pressure threshold detected by the sensor) or switching off the pump when the tap is closed (with the high pressure threshold detected by the sensor).
  • the senor is capable of switching on and off a relay (9) that is an integral part of the electric circuit and is responsible for directly controlling the switching on and off of the motor (2) of the pump (1).
  • the electric circuit is also equipped with a float switch (10) used to permanently cut out the motor (2), regardless of the fact that the tap (3a) is opened or closed.
  • the float switch can be very useful when the pump remains unattended for a long time to avoid its accidental switching on, due to the accidental opening of the tap by unauthorized personnel.
  • the components of the electric circuit of the motor (2) are housed inside the pump (1) next to the pressure sensor (8).
  • the same location can also be used to install electronic boards (possibly with microprocessor) to switch on and off the pump in a more articulated way, according to the specific requirements or needs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP99830358A 1998-06-12 1999-06-10 Tiefbrunnenpumpe mit integriertem Druckschalter Withdrawn EP0964157A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT98MC000026 IT245159Y1 (it) 1998-06-12 1998-06-12 Elettropompa sommersa capace di attivarsi e disattivarsiautomaticamente in base ai valori di pressione registrati in
ITMC980026U 1998-06-12

Publications (1)

Publication Number Publication Date
EP0964157A1 true EP0964157A1 (de) 1999-12-15

Family

ID=11357503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99830358A Withdrawn EP0964157A1 (de) 1998-06-12 1999-06-10 Tiefbrunnenpumpe mit integriertem Druckschalter

Country Status (2)

Country Link
EP (1) EP0964157A1 (de)
IT (1) IT245159Y1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2506280A (en) * 2008-11-17 2014-03-26 Salamander Pumped Shower Systems Ltd Pumping apparatus with printed circuit and switching device
WO2015022010A1 (de) * 2013-08-12 2015-02-19 Alfred Kärcher Gmbh & Co. Kg Flüssigkeitspumpenanordnung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3865512A (en) * 1973-11-19 1975-02-11 Weil Mclain Co Inc Control apparatus for a water supply system
EP0233554A2 (de) * 1986-02-08 1987-08-26 Bomin Solar GmbH & Co KG Anordnung zum Aufbau des Entnahme-Druckes in einem Wasserversorgungssystem
US5281101A (en) * 1992-07-01 1994-01-25 Mcneil (Ohio) Corporation Water supply system and method of operation thereof
US5518371A (en) * 1994-06-20 1996-05-21 Wells, Inc. Automatic fluid pressure maintaining system from a well

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3865512A (en) * 1973-11-19 1975-02-11 Weil Mclain Co Inc Control apparatus for a water supply system
EP0233554A2 (de) * 1986-02-08 1987-08-26 Bomin Solar GmbH & Co KG Anordnung zum Aufbau des Entnahme-Druckes in einem Wasserversorgungssystem
US5281101A (en) * 1992-07-01 1994-01-25 Mcneil (Ohio) Corporation Water supply system and method of operation thereof
US5518371A (en) * 1994-06-20 1996-05-21 Wells, Inc. Automatic fluid pressure maintaining system from a well

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2506280A (en) * 2008-11-17 2014-03-26 Salamander Pumped Shower Systems Ltd Pumping apparatus with printed circuit and switching device
GB2506280B (en) * 2008-11-17 2014-07-30 Salamander Pumped Shower Systems Ltd Improvements in pumping apparatus
WO2015022010A1 (de) * 2013-08-12 2015-02-19 Alfred Kärcher Gmbh & Co. Kg Flüssigkeitspumpenanordnung

Also Published As

Publication number Publication date
ITMC980026U1 (it) 1999-12-12
IT245159Y1 (it) 2002-03-19
ITMC980026V0 (it) 1998-06-12

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